Chemistry : general, medical, and pharmaceutical including the chemistry of the ; a manual on the general principles of the science, and their applications in medicine and pharmacy . —Place a few iron tacks indilute nitric acid and set aside ; solution of ferric nitrate, orpernitrate of iron, is formed (Fe26N03). Fe2 + 8HNO3 = Fe26N03 + 4H20 + 2NO Iron. Nitric Ferric Water. Nitric acid. nitrate. oxide. This solution, made with care, and of a prescribed strength, formsthe Liquor Ferri Pernitratis, B. P. (sp. gr. ) and U. S. P. ( ). The process is as follows : Fo
Chemistry : general, medical, and pharmaceutical including the chemistry of the ; a manual on the general principles of the science, and their applications in medicine and pharmacy . —Place a few iron tacks indilute nitric acid and set aside ; solution of ferric nitrate, orpernitrate of iron, is formed (Fe26N03). Fe2 + 8HNO3 = Fe26N03 + 4H20 + 2NO Iron. Nitric Ferric Water. Nitric acid. nitrate. oxide. This solution, made with care, and of a prescribed strength, formsthe Liquor Ferri Pernitratis, B. P. (sp. gr. ) and U. S. P. ( ). The process is as follows : Four and a half flnidounces ofnitric acid are diluted with sixteen ounces of distilled water, and oneounce of iron wire, free from rust, dissolved in the mixture, the latterbeing kept cool to avoid violence of action. The liquid is finallyfiltered and diluted to thirty flnidounces. Ferric nitrate and ferric acetate unite to form various aceto-nitrates,amongst which is one having the formula Fe24C2H302N03HO,4H20crystallizing in hard, shining, brownish-red prisms. Reduced Iron. Seventeenth Synthetical Reaction Pass hydrogen gas (dried by passing over pieces of chloride of calcium contained in a. Preparation of Reduced Iron. tube, or throughquantity of ferricP.) contained inbottom of whichwell), the oxidemoved from theopen end of the14 sulphuric acid in a wash bottle) into a smalloxyhydrate or oxide ( subcarbonate, U. tube arranged horizontally (a test-tube, thehas been accidentally broken, answers verybeing kept hot by a gas-flame ; oxygen is re-oxide by the hydrogen, steam escapes at thetube, and after a short time, when moisture 158 THE METALLIC RADICALS. ceases to be evolved, metallic iron, in a minute state of divisionremains. (See Fig. 32.) Fe203 + 3H2 = Fe2 + 3HaO. Ferric Hydrogen. Iron. Water. oxide. While still hot throw the iron out into the air; it takes fireand falls to the ground as oxide. If the ferric oxide is reduced in a gun-barrel heated by a strongfurnace, t
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